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[Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads
From: |
Daan Scherft |
Subject: |
[Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads |
Date: |
Mon, 15 Jul 2019 13:34:23 -0000 |
** Tags added: ppc
--
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https://bugs.launchpad.net/bugs/1836558
Title:
Qemu-ppc Memory leak creating threads
Status in QEMU:
New
Bug description:
When creating c++ threads (with c++ std::thread), the resulting binary
has memory leaks when running with qemu-ppc.
Eg the following c++ program, when compiled with gcc, consumes more
and more memory while running at qemu-ppc. (does not have memory leaks
when compiling for Intel, when running same binary on real powerpc CPU
hardware also no memory leaks).
(Note I used function getCurrentRSS to show available memory, see
https://stackoverflow.com/questions/669438/how-to-get-memory-usage-at-
runtime-using-c; calls commented out here)
Compiler: powerpc-linux-gnu-g++ (Debian 8.3.0-2) 8.3.0 (but same problem with
older g++ compilers even 4.9)
Os: Debian 10.0 ( Buster) (but same problem seen on Debian 9/stetch)
qemu: qemu-ppc version 3.1.50
---
#include <iostream>
#include <thread>
#include <chrono>
using namespace std::chrono_literals;
// Create/run and join a 100 threads.
void Fun100()
{
// auto b4 = getCurrentRSS();
// std::cout << getCurrentRSS() << std::endl;
for(int n = 0; n < 100; n++)
{
std::thread t([]
{
std::this_thread::sleep_for( 10ms );
});
// std::cout << n << ' ' << getCurrentRSS() << std::endl;
t.join();
}
std::this_thread::sleep_for( 500ms ); // to give OS some time to wipe
memory...
// auto after = getCurrentRSS();
std::cout << b4 << ' ' << after << std::endl;
}
int main(int, char **)
{
Fun100();
Fun100(); // memory used keeps increasing
}
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- [Qemu-devel] [Bug 1836558] [NEW] Qemu-ppc Memory leak creating threads, Daan Scherft, 2019/07/15
- [Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads,
Daan Scherft <=
- [Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads, Alex Bennée, 2019/07/15
- [Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads, Daan Scherft, 2019/07/15
- [Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads, Alex Bennée, 2019/07/15
- [Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads, Alex Bennée, 2019/07/15
- [Qemu-devel] [Bug 1836558] Re: Qemu-ppc Memory leak creating threads, Alex Bennée, 2019/07/15